Conclusion
CPET confirmed the presence of DB in the patient based on the low
resting value of ETCO2, the presence of a chaotic pattern of respiration
during resting and exercise with the presence of tachypnoea (with very
low ventilatory efficiency) in maximal exertion. Diagnosis of DB using
CPET is one of the methods of DB diagnostics. Proper respiratory
rehabilitation and psychological guidance resulted in the patient fixing
the respiratory pattern and subsequently eliminating the primary cause
of the examination - chronic fatigue. Patients with CFS/ME are a common
paediatric problem. The current possibilities of diagnostics are
enriched by the possibility of performing CPET, which can be a benefit
in differential diagnostics as well as in confirming the diagnosis.